Is An Exclusivity Clause Enforceable in United Kingdom?
Exclusivity clauses are enforceable as ordinary contract terms in the UK, but are subject to UK competition law, which prohibits agreements that restrict competition — particularly relevant where a party has significant market power. Vertical exclusivity arrangements below certain market-share thresholds generally benefit from safe-harbour treatment.
This page describes the general approach United Kingdom law takes to this clause type — it is informational, not legal advice on any specific contract. Enforceability in a real dispute depends on the exact wording, the specific facts, and current law, all of which can change. Have your actual clause reviewed by a lawyer before relying on it.
How United Kingdom approaches this
UK competition law, operating post-Brexit under its own domestic framework modelled closely on the previous EU regime, prohibits agreements that have the effect of restricting competition — exclusivity and exclusive-dealing arrangements are a recognised category of concern, especially involving dominant suppliers.
A vertical exclusivity arrangement — such as a supplier requiring a distributor to deal exclusively with them — generally benefits from a more permissive treatment where the parties' market shares fall below defined thresholds, reflecting that most ordinary commercial exclusivity doesn't meaningfully harm competition.
The practical risk concentrates around arrangements involving parties with significant market power, or exclusivity terms broad and long enough to meaningfully foreclose competitors from accessing the market — routine commercial exclusivity between parties without market power is comparatively low risk.
What determines the outcome
- Market share of the parties relative to competition-law safe-harbour thresholds
- Duration and scope of the exclusivity, and its practical market-foreclosure effect
- Whether the arrangement is vertical (supplier-distributor) or between competitors
Practical guidance
- Assess market share against relevant safe-harbour thresholds before finalising broad exclusivity terms
- Keep exclusivity duration proportionate — indefinite or very long exclusivity increases competition-law risk
- Get specific competition-law advice where either party has significant market power
Frequently asked questions
Is an exclusivity clause enforceable in United Kingdom?
Exclusivity clauses are enforceable as ordinary contract terms in the UK, but are subject to UK competition law, which prohibits agreements that restrict competition — particularly relevant where a party has significant market power. Vertical exclusivity arrangements below certain market-share thresholds generally benefit from safe-harbour treatment.
Is this legal advice?
No. This page describes the general approach United Kingdom law takes to exclusivity clauses — it is not legal advice on any specific contract. Enforceability in a real dispute depends on the specific wording, facts, and current law. Have the actual clause reviewed by a lawyer before relying on it.
Exclusivity Clause in other jurisdictions
Other clauses in United Kingdom
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